Valve control.



B. HERKT. VALVE CONTROL. APPLICATION FILED PEB.19,1913

Patented Dec. 15, 1914.

4 J "H' "O snares PATNT OFFICE} ERNST HE-BKT, OF KIEL-HASSEE, GERMANY, ASSIGNOR TO FRIED. KRUI'P AKTIENGE-f SELLSCHAFT GERMANIAWEBFT, F KIELGAARDEN, GERMANY.

VALVE CONTROL.

Specification of Letters I'etent.

Patented Dec. 15, 1914.

T 0 all whom it may concern:

Be it known that I, ERNST Hanna, a pitizen of the German Empire, residing at Imel- Hassee, Germany, have invented certain new.

and useful Improvements in Valve Controls, of which the following is a specification.

This invention relates to those two-stroke oycle internal combustion engines in which a plurality of scavenging valves arranged in the cylinder cover, are controlled by a com mon controlling lever, through the interposition of a multiple -armed intermediate piece, and are so arranged that between them space is left free for the fuel valve. In such a valve-arrangement it is not always possible'to have the controlling lever engaged exactly in the center of gravity of the intermediate piece, and when this is not accomplished, the unequal-distribution of mass readily results in unbalance of the intermediate piece and through that, in an um equal contro of the individual valves."

The inven 'on aims to provide for the valves of the aforesaid type of internal combustion engines, a controlling means through which all of the valves will be uniformly controlled In the accompanying drawing, the subjectqnatter of the invention is shown by way of example, Figure 1 showing a vertical section through the working cylinder with the extreme right of the cylinder broken away,-

ind lgig. 2 the top plan view belonging to In the cover A of a two-stroke cycle internal combustion engine, are arranged in a known manner, three scavenging valves C, which open tower? L 1e interior of the cylinder, and communicate through the medium of two flange-couplings c, with the main scavenging pipe, not shown. These scavenging valves are controlled from a controlling shaft D, with cam E, by a controlling lever F, l", acting upon said valves, in common, through the medium of a three armed intermediate piece ll. lhe controlling lever is deflected and is carried by bearingblocks c, 0 cast upon the housing of the scavenging valve C, lying between them. The part F of the controlling, lever is forked and carries the controlling roller f.

The intermediate piece H, is straightly guided by a hollow cylindrical prolongation H, in a likewise hollow cylindrical part J, rigidly connected with the cylinder c0ver.- The engagement of the arm F, of the controlling lever, with the intermediate piece is accomplished throiigh the medium of a thrust-rod G, with spherical ends, and a potshaped shell L. The latter is introduced into an opening in the prolongation Hfland supports itself upon the annular projection it, through the medium of a flange i. The counter-bearin f, provided on the controlling lever for t e thrust-rod G, is exchangeable; :1 similar counter bearing forms the bottom of the shell L. A helical, spring K,

surrounding the shell L, serves to sustain the three valve springs 0 belonging to the respective valves.

Introduced inan oblique direction in the s area between the three scavenging valves is the fuelspraying valve M, which will likewise he controlled by a controlling cam disk, not shown.

The operation of the described controlling device will be recognized from the drawing \vith0ut further discussion. By the straightline guiding of the intermediate piece H, as compared with the operation of known valve-controls of this type, the advantage is obtained of wholly preventing tipping of the intermediatepiece, with the consequent.- unequal control of the three valves, which condition without this guide, could, ondoubtedly occur with the unequal lengths of the arms of the intermediate piece. Furthermore, should it be desired, as in known valve-controls, to have the control-lever operate upon the intermediate piece'from immediately above, there would be thecircumg stance of the tendency of the intermediate member to tip, even with the straight-line guide, which could induce one sided wear of the straight guide, or even a binding of the part H in the part J. This condition is cfl'ect-ually combated in the described. controlling means, by having the point of on gagement of the controlling lever F, F, at a much as relieves them of the load of the' miter-mediate piece; on the other hand,

.The spring K, sustains, on the one hand,

the valve springs in their operation inasthe unequally distributed mass which, again,

could manifest itself in a one-sided wear :of

jthe straight guide "or a binding its parts.

I claimz- 1; In awalvecontrolling mechanism ior two-stroke cycle internal combustion engines, the combination of a plurality of scavenging valve's,'a single controlling memher and an intermediate piece serving in common for the several valves, a straightlin'e guide for said intermediate piece, and a'bearing for the single controlling member upon the intermediate piece below thelevel of the latter. p

2. In a valve-controlling mechanism for two-stroke cycle internal combustion engines, the combination of a plurality of scavenging valves, a single controlling member and anintermediate piece serving in common for the several valves, a straight-line guide for said intermediate piece, and a bearing for the single controlling member upon the intermediate piece below the level of the latter; said valves having individual springs, and said intermediate piece having its own spring relieving the valve-springs of the load of the intermediate piece. 3. In a valve-controlling mechanism for two-stroke cycle internal combustion engines the combination of a: plurality of scavenging valves, with a single'contrplhng member and .upon the intermediate piece below of the latter; said strai prising acylindrical pro ongatl'on on them- I longation an intermediate piece serving in common for the several valves, a straight-line guide for said intermediate piece, and a bearing for the single controlhng member upon the intermediate piece-below the leveL of the latter; saidstraight-line guide comprising a cylindrical prolongation on the intermediate piece the engine. 4'

4. In a valve-controlling mechanism for two-stroke cycle internal combustion engines the combination of a plurality of scavenging alves, a singlecontrolling member and an'j ntermediate piece serving m cornmon for the several valves, 'a straight-line guide for said intermediate piece, and a bearing for the single controlling member the level" l t-line guide com-w te'rmediate piece and a cooperating cylindrical guide on the engine; said cylindrical probeing hollow and said bearing for- 7 the, single controlling member being located within said prolongation.

and a codperating cylindrical guide on memes p 5.. In a valve-controlling mechanism for two'stroke cycle internal combustion ens gines, the combination of a plurality of scavenging valves, a single controlling memher and an intermediate piece servin in common for the several valves, a straightline guide, for said intermediate piece, and a beanngx for the single controlllngf member upon t e intermediate piece below the level of the latter, and comprising a thrustrrod having 3o1nted bearings against said single control member and said intermediate piece,

6. In a valve-controlling mechanism for :two-stroke cycle internal combustion en gines, the combination of a plurality of scavenging valves, a single controlling memher and an intermediate piece servin in common for the several valves, a straightline guide for said intermediate piece, and a bearing for the single controlhng member upon the intermediate piece below the level of the latter, and comprising a shell projecting through said intermediate member and athrust-vrod extending between andhaving jointed bearings against the single-control member and the bottom-of said shell.

7'. In a valve-controlling mechanism for two-stroke cycle internal combustion engines, the'combination of a plurality of scavenging'valveaa single controlling member and an lntermedlate piece serving in common for the several valves, a straightline guide for said intermediate piece, and a bearin for the single controlling member upon t e intermediate piece below the level of the latter, and comprising a thrust-rod having jointed bearings against said single control member and said intermediate piece, and an exchangeable counter bearing for said rod, on the single controlling member.

8. In an internal combustion engine having a plurality of valves each provided with its own independent spring, in combination a multiple-arm intermediate piece serving incommon ,for all the valves to. act uat e them simultaneously, a spring for said intermediate iece, relieving the valve-springs of the .loa thereof, an elongated hollow cylindrical prolongation on said intermediate piece, a hollow cylindrical ide on the engine in which said prolongation works, a thrust-rod bearing upon the intermediate piece below the plane of the arms thereof, and a. single controlling lever bearing upon said thrust rod.

9. In an internal combustion engine has- .ing a plurality of valves each provided with its own independent spring, in combination a multiplearm intermediate piece serving in common for all the valves to actuate them simultaneously, a spring for said intermediate piece,

load thereof, an elongated hollow cylindrical prolongation on said intermediate piece, a

relieving the valve-springs of the hoilirv cyiindricai guidw on the engine in which said nmlanga-tion Works, a thrust-rod hearing upon the intermediate piece below the plane of arms thereof, and a single controlling lever bearing upon said thrustrod, them being a pobshaped shell extended thrmigh {1115i into the pmiungaiion of the intei'ii'ierlnzbe menibnr and providing the bearing for the thrust-rod and the guide for the spring on said intervening member.

In testimony whereof I have aflixed my signature in presence of two witnesses.

ERNST HERKT. Witnesses CUR! II BLHIG,

\VILLsCHUR Burn-1R1. 

